Step 1

Pour the lime juice and gin into the highball glass.

Step 2

Add the cilantro and 4 to 5 slices of serrano pepper. Muddle for 30 seconds, until the they've broken up.

Step 3

Fill 3/4 of the way with ice cubes.

Step 4

Fill the remainder of the glass with tonic.

Step 5

Garnish with a bunch of cilantro and additional serrano peppers if desired.